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Sub-problem 3b: Operational Analysis of the Center Section of Krome Avenue (Class I or II Two-Lane Highway)

Exhibit 3-20 compares the results from the planning level analysis in sub-problem 2b with the operational level analysis. It shows the values assumed by the service volume tables for all parameters, as compared with the values that apply to this facility. It also shows the computations and results for both methods. The ATS was computed as 39.3 mph. The PTSF was computed as 70.1%.

If this facility were designated as a Class I highway, the ATS would be the critical determinant of LOS, producing a value of E. The PTSF would have suggested LOS D. If the designation were changed to Class II, the ATS would be eliminated as a determinant of LOS, and the PTSF would establish LOS D.

Exhibit 3-20. Center Section: Comparison of Planning and Operational Level Analysis Results
Input Data	Table Assumptions HCM Chapter 10 Sub-problem 2b		Field Observations HCM Chapter 20 Sub-problem 3b
Terrain	Level		Level
Base Free Flow Speed	N/A		53.1 mph
Access Points Per Mile	N/A		2
Shoulder Width	N/A		3
Free Flow Speed	50 mph		50
Directional Split	60/40		57/43
Percent Trucks	14		26
Percent RV's	4		Included in Percent Trucks
Percent No Passing	20		8
PHF	N/A		0.91
Design Hour Volume	1,190		1,190
	Comparison of Results
	Table Thresholds		Computations
	LOS A:	---	ATS=39.3 PTSF=70.1 v/c=0.42
	LOS B:	---
	LOS C:	330
	LOS D:	1,000
	LOS E:	2,770
Estimated LOS
Class I Facility	E		E
Class II Facility	N/A		D